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UTMB - Ultra Trail du Mont-Blanc

From Friday 29 to Sunday 31 August 2025

The Ultra-Trail du Mont-Blanc (UTMB) is much more than just a trail race; it's a multi-day odyssey through 3 magnificent Alpine countries: France, Italy and Switzerland. Set against the majestic backdrop of the Mont Blanc massif, this legendary event is a must for lovers of sport, nature and tourism.

With its 176km and 9,900 metres of ascent, the UTMB is the ultimate adventure for fans of extreme challenges! Attracting thousands of enthusiasts from all over the world, this legendary race invites you to push back your physical and mental limits by covering an impressive distance in a maximum of 46 hours and 30 minutes. Imagine crossing breathtaking alpine landscapes, from green valleys to snow-capped peaks, while living a transformative experience that combines sporting challenge, cultural discovery and total immersion in nature. The UTMB is not just a race, it's an unforgettable odyssey in the heart of the Alps, where every stride you take brings you closer to a personal achievement.

Why take part in the UTMB?

Ultimate challenge: The UTMB is one of the most demanding trail races in the world, offering an unprecedented physical and mental challenge.
Breathtaking scenery: Cross breathtaking alpine panoramas, from lush green valleys to snow-capped peaks.
International experience: Cross three countries in a single race, discovering the cultural and natural wealth of each region.
Festive atmosphere: Enjoy an electric atmosphere with thousands of spectators and meticulous organisation.

UTMB crossing points

Here are some of the UTMB's emblematic crossing points:

Chamonix (Start): The mythical starting point where the adventure begins.
Les Houches: First stage after 7.8 km of racing.
Saint-Gervais: At 21.5 km, a demanding climb to the heights.
Les Contamines: At 31.2 km, a welcome refreshment point before the passes.
Courmayeur: 82.6km, a stopover in Italy to recharge your batteries.
Grand Col Ferret: At 105.6 km, a crossing on the border between Italy and Switzerland.
Champex-Lac: 129.4 km away, a magnificent alpine lake to recharge your batteries.
Trient: At 145.9 km, a technical descent before the final straight.
Vallorcine: At 158 km, a charming village before the final ascent.
Chamonix (Finish): The triumphant return after 176km of intense effort.

Other UTMB events

The UTMB offers several race formats to meet the expectations of all trail runners:

UTMB (176 km): The queen race with its 9900 metres of positive ascent, crossing breathtaking alpine landscapes.
CCC (101 km): From Courmayeur to Chamonix, a demanding but accessible race.
TDS (148 km): In the footsteps of the Dukes of Savoy, a wild and technical race.
OCC (57 km): From Orsières to Chamonix, an ideal distance for discovering the world of trail running.
PTL (300 km): La Petite Trotte à Léon, an extraordinary adventure for seasoned trail runners.

Live the UTMB Experience with CGH Résidences & Spas: Our residences offer comfort and well-being, ideal for recovering after the effort. Discover the charms of Les Houches and the surrounding villages, and enjoy the local gastronomy and outdoor activities.